import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/Users.vue'
Vue.use(Router)

const router = new Router({
    routes: [
        { path: '/', redirect: '/login' },
        { path: '/login', component: Login },
        {
            path: '/home',
            component: Home,
            redirect: '/welcome',
            children: [
                { path: '/welcome', component: Welcome },
                { path: '/users', component: Users },
            ]
        }
    ]
})

//挂在路由守卫
router.beforeEach((to, from, next) => {
    //to将要访问的路径
    //from代表从哪个路径跳转而来
    //next 是一个函数，表示放行
    //next() 放行 next('/login') 强制跳转
    if (to.path === '/login') return next()
        //获取token
    const tokenStr = sessionStorage.getItem('token')
    if (!tokenStr) return next('/login')
    next()
})
export default router